Improved flastering-trowel



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JEROME C'. .DIETRICH Letters Patent N 92,0

(laterz .new 29,1869.

IMPROVE!) PLAS TERING-TROWEL.

The Schedule referred to in these Lett ers Patent and making part of the same.

To all whom it may concern Be it known that we, JEROME C. DIETRICH and CHARLES I. HUMPHEEY, of the city of Rochester, in the county of Monroe, and State of New York, have invented certain new and useful Improvements in Masons Plastering-Trowels; and wedo hereby declare that .the following is a full and exact descriptionl thereof, reference being had tothe accompanying drawings, making part of this specification.

Our invention relates to' the construct-ion of the arm or standard which connects the -handle with the trowel-blade, and is applicable to both spreading and nishing-trowels.

,Heretofore this arm has usually been a straight bar, which some have widened out so as to protect the hand from the mortar, and to increasel the bearing surface, which presses against the forenger of the hand, while operating with it.

In using a trowel, the great strain comes upon the l hand, which is required to grasp the round handle with sufficient force to steadily hold the trowel-blade at the propcr inclination or position relative to the wall. The power and fulcrum being on opposite sides of the handle, the force exerted is applied at a great mechanical disadvantage.

By permitting the standard to press against the forelinger of the hand, the fulcrum is in a measure transferred to that point, which is so much nearer the resistance, or trowel-blade, as to enable the instrument to be used with greater ease.

Ihe object of our invention is to so construct this standard as to enable it to be grasped between the thumb and forefinger, and easily-held withontbruising or straining the hand, as would be the case were the standard constructed in the ordinary manner.

The invention consists in constructing the front side of the standard so as to form a depression or seat for the thumb, as will hereafter be fully explained.

In the drawings above referred to.-

Figure I represents a side velevation of m trowel, with the handle shown in section.

y improve Figure ILis a perspective view.

Figure III is a front elevation.

Like letters of reference desi of the figures.

A is the trowel-bladc;

B, the wooden handle; and

G, the arm or standard connecting the two, which is cast or otherwise formed, with a shank, d, for fitting vin the handle, and a corresponding one, d', for attachment to the trowel-blade.' The latter will vary in construction according as it is designed 'for a spreading or dressing-trowel.

e is the channel or recess formed across the stand, at the rear, for receiving the forenger.

f f are the extended wings of the same, which curve toward the front, as shown; and ,A

g g are depressionsor seats for the thumb, formed in the front side, the wings f serving as guards to retain the thumb in place.

by the right hand, the bretinger will naturally tit in the channel e, which so distributes the pressure against it, as to prevent the wearing or bruising of the linger, while the thumb, which is placed over the end of the handle, in the depression g, lis equally well protected by the correspomling construction thereof.

These depressions c g, not only thus protect the thumb and linger from injury, but also form seats that retain them in place, and form the fulcrum of the trowel while it is beiugnsed.

What we claim as our invention, and vdesire to secure by Letters Patent, is-

The standard 0,formed with depressions g, and curved win gsv f, with or without the recess e, as herein shown and described.

' JEROME G. DIETRICH.

CHAS. I. HUMPHREY. Witnesses:

A. G. MEINEN, JOSEPH RAN.

gnate like parts in each From what has been before stated, the operation of. our improvements is obvious; the handle being grasped 

